| # dump dalvik backtrace |
| define dbt |
| if $argc == 1 |
| set $FP = $arg0 |
| else |
| set $FP = $r5 |
| end |
| |
| set $frame = 0 |
| set $savedPC = 0 |
| while $FP |
| set $stackSave = $FP - sizeof(StackSaveArea) |
| set $savedPC = ((StackSaveArea *)$stackSave)->savedPc |
| set $method = ((StackSaveArea *)$stackSave)->method |
| printf "#%d\n", $frame |
| printf " FP = %#x\n", $FP |
| printf " stack save = %#x\n", $stackSave |
| printf " Curr pc = %#x\n", ((StackSaveArea *) $stackSave)->xtra.currentPc |
| printf " FP prev = %#x\n", ((StackSaveArea *) $stackSave)->prevFrame |
| if $method != 0 |
| printf " returnAddr: 0x%x\n", \ |
| ((StackSaveArea *)$stackSave)->returnAddr |
| printf " class = %s\n", ((Method *) $method)->clazz->descriptor |
| printf " method = %s (%#08x)\n", ((Method *) $method)->name, $method |
| printf " signature = %s\n", ((Method *) $method)->shorty |
| printf " bytecode offset = 0x%x\n", (short *) (((StackSaveArea *) $stackSave)->xtra.currentPc) - (short *) (((Method *) $method)->insns) |
| set $regSize = ((Method *) $method)->registersSize |
| set $insSize = ((Method *) $method)->insSize |
| set $index = 0 |
| while $index < $regSize |
| printf " v%d = %d", $index, ((int *)$FP)[$index] |
| if $regSize - $index <= $insSize |
| printf " (in%d)\n", $insSize - $regSize + $index |
| else |
| printf " (local%d)\n", $index |
| end |
| set $index = $index + 1 |
| end |
| else |
| printf " break frame\n" |
| end |
| set $FP = (int) ((StackSaveArea *)$stackSave)->prevFrame |
| set $frame = $frame + 1 |
| end |
| end |
| |
| document dbt |
| Unwind Dalvik stack frames. Argument 0 is the frame address of the top |
| frame. If omitted r5 will be used as the default (as the case in the |
| interpreter and JIT'ed code). |
| end |
| |
| # ART debugging. ART uses SIGSEGV signals for internal purposes. To allow |
| # gdb to debug programs using ART we need to treat this signal specially. We |
| # also set a breakpoint in a libart.so function to stop when the program |
| # hits an unexpected breakpoint |
| set $art_debug_enabled = 0 |
| define art-on |
| if $art_debug_enabled == 0 |
| # deal with SIGSEGV signals |
| handle SIGSEGV noprint nostop pass |
| |
| # set a breakpoint and record its number |
| set breakpoint pending on |
| break art_sigsegv_fault |
| set $art_bpnum = $bpnum |
| commands $art_bpnum |
| silent |
| printf "Caught SIGSEGV in user program\n" |
| end |
| set breakpoint pending auto |
| |
| printf "ART debugging mode is enabled.\n" |
| printf "If you are debugging a native only process, you need to\n" |
| printf "re-enable normal SIGSEGV handling using this command:\n" |
| printf " handle SIGSEGV print stop\n" |
| set $art_debug_enabled = 1 |
| else |
| printf "ART debugging mode is already enabled.\n" |
| end |
| end |
| |
| document art-on |
| Enter ART debugging mode. In ART debugging mode, SIGSEGV signals are ignored |
| by gdb unless they are not handled by ART itself. A breakpoint is |
| set to stop the program when an unexpected SIGSEGV signal is |
| encountered. |
| |
| To switch ART debugging mode off, use "art-off" |
| end |
| |
| define art-off |
| if $art_debug_enabled == 1 |
| # restore SIGSEGV to its default |
| handle SIGSEGV print stop pass |
| |
| # delete our breakpoint |
| delete $art_bpnum |
| |
| set $art_debug_enabled = 0 |
| printf "ART debugging mode is disabled.\n" |
| end |
| end |
| |
| document art-off |
| Leave ART debugging mode. Signal handling is restored to default settings. |
| |
| Use the command "art-on" to enable ART debugging mode. |
| end |